摘要
为克服线性均衡性能的局限性及避免传统判决反馈均衡器的高复杂度,提出了一种判决反馈均衡算法D-MMSE-FE。该均衡器先是分析线性MMSE均衡的结果成分,并根据最小均方误差准则计算出均衡器的前、后向传递函数,形成反馈链路,提高均衡器性能。将该种均衡器应用于TDD-LTE 1×2 SIMO上行链路中,在协议中常用的信道下进行了计算机仿真,仿真结果表明,TDD-LTE 1×2 SIMO均衡器相对于线性均衡器使系统性最多可提高达2 d B。
A new decision feedback equalizer algorithm which is called Double MMSE Feedback Equalizer and D-MMSE-FE for short was presented to improve the ability of linear equalizer and avoid the high complexity of the traditional decision feedback equalizer. The new algorithm analyses the result of linear MMSE equalizer first and obtains the front and back transfer functions according to the minimum mean square error criterion. A link circuit is em- ployed to improve the ability of equalizer. The new Equalizer is put into use in the TDD LTE uplink SIMO 1 ×2 receiver as an example, and simulated in the common channels in 3GPP protocol. The results show that the new equalizer improves equalization performance by up to 2 dB compared with the linear equalizer.
出处
《电子科技》
2015年第8期63-66,70,共5页
Electronic Science and Technology
关键词
频域均衡
判决反馈
长期演进
最小均方误差准则
frequency domain equalization
decision feedback
long term evolution
minimum mean square error criterion
